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Summary of Significant Accounting Policies Net Income Per Share (Details) (USD $)
 12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Accounting Policies [Abstract]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 700,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 200,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 500,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Weighted Average Number Diluted Shares Outstanding Adjustment 164,000us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 342,000us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 459,000us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Dilutive Securities, Effect on Basic Earnings Per Share, Including Options and Restrictive Stock Units $ 0.00us-gaap_AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits $ 0.00us-gaap_AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits $ (0.01)us-gaap_AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits